public class Example7_5 {
    public static void main(String args[]) {
      Bank bank = new Bank();
      try{ bank.income(200,-100);
           bank.income(300,-100);
           bank.income(400,-100);
           System.out.printf("银行目前有%d元\n",bank.getMoney());
           bank.income(200,100);
           bank.income(99999,-100);
      }
      catch(BankException e) {
           System.out.println("计算收益的过程出现如下问题:");
           System.out.println(e.warnMess());
      }
      System.out.printf("银行目前有%d元\n",bank.getMoney());
    }
}
